Photoacoustic spectrometry and resonant frequency tracking based dual-mode gas sensor

Wang, Jianwei; Chen, Mingyang; Chen, Qianqian; An, Yuxun; Feng, Zonglin; Wang, Huili

doi:10.1016/j.snb.2023.133796

Cited by 12 publications

(3 citation statements)

References 29 publications

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“…Due to the frequency drift caused by high concentrations of CO 2 , − modulation frequency tracking and calibration are necessary. By changing the size of the modulation frequency every 5 s, the scanning frequency is adjusted to find the maximum point of the photoacoustic signal.…”

Section: Resultsmentioning

confidence: 99%

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO

Mao,

Tan,

et al. 2023

ACS Sens.

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Section: Resultsmentioning

confidence: 99%

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO

Mao,

Tan,

et al. 2023

ACS Sens.

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“…Dual-band photodetectors provide an ideal solution for enhanced target identification and are important in advanced infrared detection systems. 11–13 Current dual-band photodetectors are mainly based on materials such as HgCdTe (MCT), 14,15 MgZnO, 16 or structures such as quantum wells (QWIPs), 17,18 type II superlattices with triboelectric level contacts (SLs), 19–23 GAN/AlGaN, 24 Ge/Si, 25,26 and so on. These structures are prepared using multilayer materials.…”

Section: Introductionmentioning

confidence: 99%

A multi-dimensional photodetector based on an α-MoO₃ grating and graphene

Wang,

Liu

et al. 2024

Phys. Chem. Chem. Phys.

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“…Recently, Wang et all [27] demonstrated the feasibility to use a combined PA and resonance frequency tracking (RFT) technique for the detection of methane gas (CH4), in a wide concentration range: the measurement of concentrations up to 30% exploits PA detection, above this value the system switches to the resonant frequency tracking measurement. They used a tunable distributed feedback diode laser (DFB-LD) as a light excitation source for the PA detection.…”

Section: Introductionmentioning

confidence: 99%

A Photoacoustic-Based Measurement System for Dual Detection of NO₂ and CO₂ in Combustion Exhaust Gases

Panzardi,

Drese,

Mugnaini

et al. 2023

IEEE Trans. Instrum. Meas.

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In this paper a low-cost, low-complexity photoacoustic sensing system for the simultaneous detection of CO2 and NO2 in exhaust gas is presented. The proposed system is designed as part of a Continuous Emissions Monitoring System for gas turbine emissions. The system exploits the amplification of the photoacoustic signal provided by an acoustic ring resonator, which is characterized by a simple and robust structure and is suitable for in-field measurements. The dual gas detection is obtained by exploiting two measurement principles, the first one, dedicated to the detection of NO2 which is present in the target mixture in the ppm range, is the classical PA effect. In fact, the optical source is a light emitting diode with a center wavelength of 405 nm matched on an adsorption peak of NO2. This allows for deriving the NO2 concentration measurement directly from the amplitude of the photoacoustic signal. The other mechanism is used to measure the concentration of one of the major components of the exhaust gas, with a concentration in the range of some percents. The quantity of CO2 is sensed exploiting its effect on the sound speed, and consequently on the resonance frequency of the resonator. To measure the CO2 concentration the system automatically tracks the acoustic resonance shift. The detection of the two gases is realized simultaneously by a unique sensor with real time measurements. A laboratory characterization of the proposed systems showed its feasibility. Experimental results show the possibility to detect NO2 with a resolution lower than 1 ppm whereas CO2 resolution is about 0.2%.

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Photoacoustic spectrometry and resonant frequency tracking based dual-mode gas sensor

Cited by 12 publications

References 29 publications

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO

A multi-dimensional photodetector based on an α-MoO₃ grating and graphene

A Photoacoustic-Based Measurement System for Dual Detection of NO₂ and CO₂ in Combustion Exhaust Gases

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Photoacoustic spectrometry and resonant frequency tracking based dual-mode gas sensor

Cited by 12 publications

References 29 publications

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO

Photoacoustic Spectroscopy-Based Breath Analysis for SIBO

A multi-dimensional photodetector based on an α-MoO3 grating and graphene

A Photoacoustic-Based Measurement System for Dual Detection of NO2 and CO2 in Combustion Exhaust Gases

Contact Info

Product

Resources

About

A multi-dimensional photodetector based on an α-MoO₃ grating and graphene

A Photoacoustic-Based Measurement System for Dual Detection of NO₂ and CO₂ in Combustion Exhaust Gases